级联多电平逆变器SHEPWM功率均衡控制策略

发布时间：2018-06-20 03:59

本文选题：级联H桥 + 多电平逆变器　；参考：《太阳能学报》2015年11期

【摘要】：针对级联多电平(cascaded H-bridge,CHB)逆变器特定谐波消除脉宽调制法,提出一种功率均衡控制策略。该策略利用CHB逆变器相电压有冗余的特点,对消谐方程组中基波幅值方程表达式进行等效拆分,从而保证一相中各串联H桥单元输出基波幅值相等的1/4周期对称的电压波形,实现各串联H桥单元在一个输出周期内的功率均衡。以两单元级联五电平CHB逆变器拓扑为例,对上述功率均衡控制策略进行理论分析、仿真验证和实验验证。研究结果验证了该均衡策略的正确性和可行性。
[Abstract]:A power equalization control strategy is proposed for the concatenated multilevel cascaded H-bridgedge (CHB) inverter with specific harmonic elimination pulse width modulation (PWM). Based on the redundancy of phase voltage of CHB inverter, the expressions of fundamental wave amplitude equations in harmonic elimination equations are split effectively, thus ensuring that every H bridge unit in series in one phase outputs a 1 / 4 periodic symmetrical voltage waveform with equal fundamental amplitude. The power equalization of each series H bridge unit in one output period is realized. Taking the two-cell cascaded five-level CHB inverter topology as an example, the theoretical analysis, simulation and experimental verification of the above power equalization control strategy are carried out. The results verify the correctness and feasibility of the strategy.
【作者单位】：华东交通大学电气与电子工程学院;
【基金】：国家自然科学基金(51167006;51567007) 江西省自然科学基金(20152ACB20017;20151BAB216020)
【分类号】：TM464

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